WordNet (r) 3.0 (2006):

yellow poplar
    n 1: light easily worked wood of a tulip tree; used for
         furniture and veneer [syn: tulipwood, true tulipwood,
         whitewood, white poplar, yellow poplar]
    2: tall North American deciduous timber tree having large tulip-
       shaped greenish yellow flowers and conelike fruit; yields
       soft white woods used especially for cabinet work [syn:
       tulip tree, tulip poplar, yellow poplar, canary
       whitewood, Liriodendron tulipifera]